Which command lists all Kafka topics using Zookeeper?

Which command lists all Kafka topics using Zookeeper?

• A. bin/kafka-topics.sh --zookeeper localhost:2181 --list
• B. bin/kafka-topics.sh --bootstrap-server localhost:9092 --list
• C. bin/kafka-topics.sh --zookeeper localhost:2181 --describe
• D. bin/kafka-topics.sh --zookeeper localhost:2181 --delete

Answer: (A)

Listing topics through the Kafka topics tool using Zookeeper relies on the older setup where Zookeeper holds the cluster metadata. To simply see all topics, you connect to Zookeeper (with the host and port, such as localhost:2181) and request a list. The command that does this uses the Zookeeper connection and the --list option, which asks Zookeeper for the names of all topics and returns them. Using a bootstrap-server instead connects directly to Kafka brokers and would list topics via the broker metadata, not through Zookeeper, so it doesn’t meet the requirement here. The --describe option would show detailed information about topics rather than a simple list, and --delete would remove topics rather than list them.

Listing topics through the Kafka topics tool using Zookeeper relies on the older setup where Zookeeper holds the cluster metadata. To simply see all topics, you connect to Zookeeper (with the host and port, such as localhost:2181) and request a list. The command that does this uses the Zookeeper connection and the --list option, which asks Zookeeper for the names of all topics and returns them.

Using a bootstrap-server instead connects directly to Kafka brokers and would list topics via the broker metadata, not through Zookeeper, so it doesn’t meet the requirement here. The --describe option would show detailed information about topics rather than a simple list, and --delete would remove topics rather than list them.